Vlier SLF500P Locking Knob Handle Plunger 1/2-13

Product Description

The VLIER SLF500P is a locking knob handle plunger designed for indexing, positioning, and holding applications in industrial and mechanical assemblies. The unit features a 1/2-13 thread with a 0.65-inch thread length and a spring-loaded steel plunger that delivers an initial end force of 0.5 pounds and a final end force of 4 pounds. The knurled knob integrates a locking element that secures the plunger in the retracted position, preventing unintended engagement. Typically installed by maintenance technicians, machine builders, and fabricators, the SLF500P suits jigs, fixtures, and positioning hardware where repeatable, lockable plunger action is required.

The SLF500P is suited for use in light-duty industrial fixtures, machine guarding, panel assemblies, and tooling setups where a threaded locking plunger is needed. The 1/2-13 thread size fits standard tapped holes in steel, aluminum, and plastic panels. The zinc gold chromate finish provides corrosion resistance appropriate for general indoor industrial environments. The plunger projects 0.25 inches in the engaged position, making it compatible with shallow-detent locating applications on slides, trays, and adjustable assemblies.

Key Features

• Locking element holds plunger retracted to prevent unintended engagement during setup or adjustment
• Knurled knob provides positive hand grip for tool-free operation
• Spring end force range of 0.5 pounds initial to 4 pounds final suits light indexing loads
• Steel construction with zinc gold chromate finish for corrosion resistance in indoor environments
• 1/2-13 thread size for direct installation into standard tapped holes
• Compact head diameter of 1 inch and head height of 0.48 inches for space-constrained panels

Compatibility

Designed as a direct-threaded locking plunger for standard 1/2-13 tapped holes in industrial fixtures, jigs, and positioning assemblies.

Installation Notes

Install using hand torque into a clean, properly tapped 1/2-13 hole; avoid over-torquing the body, which can distort the locking mechanism. Verify plunger projection and detent depth alignment before final tightening. No power source is required. Follow applicable machinery safety lockout procedures before servicing any assembly that uses this plunger for position retention.